/Engine/Source/Runtime/MovieScene/Public/Evaluation/PreAnimatedState/MovieScenePreAnimatedStateExtension.h
Called by group managers to allocate a new group
[FPreAnimatedStorageGroupHandle](API\Runtime\MovieScene\Evaluation\PreAnimatedState\FPreAnimatedStorageGroupHandle) AllocateGroup ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IPreAnimatedStateGroupManager](API\Runtime\MovieScene\Evaluation\PreAnimatedState\IPreAnimatedStateGroupManager) > GroupManager )